Firearm muzzle device attachment facility

Abstract

Firearms have an alignment element configured to connect to the barrel with the threaded muzzle portion exposed forward of the alignment element, the alignment element having a lock element movable between a release position and an engaged position, a muzzle device having internal threads configured to mate with the threaded portion of the barrel, the muzzle device defining a lock channel adapted to receive the lock element in the engaged position, the lock channel including wall portions configured to contact the lock element in the engaged position to prevent rotation of the muzzle device, and the lock element in the release position being clear of the lock channel to enable the muzzle device to rotate for removal from the threaded muzzle portion. The alignment element may define a first bore portion configured to closely receive a selected barrel portion immediately aft of the shoulder surface.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Patent Application No. 62 / 619,441 filed on Jan. 19, 2018, entitled “AMD (Advanced Muzzle Device) System, AR-15 / 10 and M16 / M4 Variants and Others,” claims the benefit of U.S. Provisional Patent Application No. 62 / 619,757 filed on Jan. 20, 2018, entitled “HT (Hold Tite) Gas Block System, AR-15 / 10 and M16 / M4 Variants and Others,” and claims the benefit of U.S. Provisional Patent Application No. 62 / 619,856 filed on Jan. 21, 2018, entitled “QL (Quad-Lok) Hand Guard System, AR-15 / 10 and M16 / M4 Variants and Others,” which are hereby incorporated by reference in its entirety for all that is taught and disclosed therein.FIELD OF THE INVENTION[0002]The present invention relates to firearms, and more particularly to firearm having an orientation element that releasably secures a muzzle device to the firearm in a specified orientation without requiring the use of tools or a single-use crush washe...

AI Technical Summary

Problems solved by technology

Nevertheless, since the original inception of the AR-15, M16 / M4 variants, there remains an impractical design flaw which continues to be incorporated into every revision, improvement or reconfiguration of these platforms.

This design inherently impairs simple removal and / or replacement of muzzle devices.

If the device is tightened past an intended position, or requires reorientation, retarding the muzzle device away from a previous washer crush or collapse could render the crush washer unserviceable, as previous tension would be lost.

Additionally, use of a crush washer may require cutting the washer from the barrel upon removal, as the crush action oftentimes deforms the washer around the threaded barrel, lower than the maximum thread diameter of the barrel, thus further impeding removal.

Cosmetic damage to the barrel's finish can result because use of a tool to cut off the used crush washer is frequently required.

This orientation process is problematic because the gas tube may be slightly misaligned, permitting interference with the gas key on the BCG, thus allowing undesired friction and / or drag of the components.

Likewise, and possibly more consequential, would be the compromised leaking of ballistic gas pressure between the gas tube and gas key, thus reducing the effectiveness of the direct gas impingement system cycle.

Affixing the gas block to the barrel within current industry standards is also problematic in that set screws are commonly used for this function.

Considering set screws are limited to lateral pressure in one direction, their application creates a high probability of set screw force negating proper concentricity of gas block and barrel alignment.

As such, a compromised seal between the gas block and barrel is often created, which negatively impacts the effectiveness of the direct gas impingement system cycle.

Small set screws, typically ¼″ and smaller, are commonly used in gas block installations and are prone to overtightening, seizing, and stripping of the drive profile.

It is not uncommon that seized or damaged set screws may require the gas block to be cut from the barrel to remove the gas block, which requires gas block replacement and can potentially damage the barrel.

Furthermore, tightening the set screw onto the radial surface of the barrel can also negatively impact gas block alignment as the screws tightening rotational direction on the radial surface can cause the gas block to twist upon installation.

However, the overtightening, seizing and / or stripping of the set screw drive profile remains a problematic condition, as does the unfavorable conditions regarding gas block distorting and subsequent ballistic gas pressure compromise.

As there exists no standardized pattern or set screw spacing within the firearms industry, barrel alterations regarding pocket depressions or dimples may cause mismatched conditions, including inappropriate positioning on commercially available, non-standardized gas blocks.

Additionally, misaligned gas blocks can also prevent appropriate handguard installation because internal profiles of handguards tend to be limited in space and require a close and parallel and / or perpendicular alignment with the gas block.

When a gas block's orientation prohibits handguard installation, the gas block must be reoriented, further compounding the previously stated detrimental conditions.

Finally, the current industry standard for gas block captivation can provide less than adequate mechanical holding force when hardware (i.e. set screws) has been compromised.

Gas block movement and subsequent loss of operating gas pressure commonly occurs under these circumstances.

The slotted clamp force design is problematic because clamping forces are not applied concentrically around the barrel nut's base, thus distorting and often seizing the handguard around the barrel nut, which impedes removal or adjustment.

This condition also negatively alters handguard to barrel alignment.

The extended design of the barrel nut also adds additional weight to the firearm.

Overtightening often occurs when attempting proper alignment, or a shim may be required to time thread engagement with port alignment.

This design commonly requires a special tool, such as a spanner wrench, to install or remove the handguard; which further complicates installation, removal, or adjustment of the handguard.

While this design offers more consistent and evenly dispersed clamping force, the design does not address handguard alignment and permits misaligned handguard installation.

When a handguard is misaligned, it is often difficult to access the driving profile of the hardware to secure the handguard.

With any conventional handguard design, the inability to repeatably ensure a specified alignment creates further complications when an optical aid or sighting device (e.g. flip-up sight post, laser sight, etc.) is mounted to the handguard.

When the handguard cannot be repeatably removed and reattached to a firearm in a specified alignment, sighting devices must be recalibrated or zeroed once a handguard installation has been compromised or altered.

While many prior art handguard mounting designs exist, including other variations not specifically discussed, existing handguard designs do not ensure rigid application, repeatable installation, control of proper alignment, and ease of use.

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